Brand new and high quality.Come with 7 sets different puzzle rings with different level of difficulty.Metal brain teaser condenses with traditional Chinese culture and they are quite interesting.Good for creative thinking and improve both your IQ & EQ.You soive the problem by yourself， then you will get achievement， but we still attach a diagram to satisfied with some peopleYou will not joy and stimulate within you read the secret. Wehope you have ability to solve the secret.